7cxm

Electron Microscopy
2.9Å resolution

Architecture of a SARS-CoV-2 mini replication and transcription complex

Released:

Function and Biology Details

Reactions catalysed:
S-adenosyl-L-methionine + a 5'-(5'-triphosphoguanosine)-[mRNA] = S-adenosyl-L-homocysteine + a 5'-(N(7)-methyl 5'-triphosphoguanosine)-[mRNA]
S-adenosyl-L-methionine + a 5'-(N(7)-methyl 5'-triphosphoguanosine)-(ribonucleotide)-[mRNA] = S-adenosyl-L-homocysteine + a 5'-(N(7)-methyl 5'-triphosphoguanosine)-(2'-O-methyl-ribonucleotide)-[mRNA]
Nucleoside triphosphate + RNA(n) = diphosphate + RNA(n+1)
GTP + a 5'-diphospho-[mRNA] = diphosphate + a 5'-(5'-triphosphoguanosine)-[mRNA]
Thiol-dependent hydrolysis of ester, thioester, amide, peptide and isopeptide bonds formed by the C-terminal Gly of ubiquitin (a 76-residue protein attached to proteins as an intracellular targeting signal).
TSAVLQ-|-SGFRK-NH(2) and SGVTFQ-|-GKFKK the two peptides corresponding to the two self-cleavage sites of the SARS 3C-like proteinase are the two most reactive peptide substrates. The enzyme exhibits a strong preference for substrates containing Gln at P1 position and Leu at P2 position.
ATP + H(2)O = ADP + phosphate
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero nonamer (preferred)
PDBe Complex ID:
PDB-CPX-145037 (preferred)
Entry contents:
4 distinct polypeptide molecules
3 distinct RNA molecules
Macromolecules (7 distinct):
RNA-directed RNA polymerase nsp12 Chain: A
Molecule details ›
Chain: A
Length: 942 amino acids
Theoretical weight: 108.16 KDa
Source organism: Severe acute respiratory syndrome coronavirus 2
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0DTD1 (Residues: 4393-5324; Coverage: 13%)
Gene names: 1a-1b, rep
Sequence domains:
Non-structural protein 8 Chains: B, D
Molecule details ›
Chains: B, D
Length: 198 amino acids
Theoretical weight: 21.9 KDa
Source organism: Severe acute respiratory syndrome coronavirus 2
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0DTD1 (Residues: 3943-4140; Coverage: 3%)
Gene names: 1a-1b, rep
Sequence domains: Coronavirus replicase NSP8
Non-structural protein 7 Chain: C
Molecule details ›
Chain: C
Length: 83 amino acids
Theoretical weight: 9.25 KDa
Source organism: Severe acute respiratory syndrome coronavirus 2
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0DTD1 (Residues: 3860-3942; Coverage: 1%)
Gene names: 1a-1b, rep
Sequence domains: Coronavirus replicase NSP7
Helicase nsp13 Chains: E, F
Molecule details ›
Chains: E, F
Length: 601 amino acids
Theoretical weight: 66.93 KDa
Source organism: Severe acute respiratory syndrome coronavirus 2
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0DTD1 (Residues: 5325-5925; Coverage: 9%)
Gene names: 1a-1b, rep
Sequence domains:
RNA (25-MER) Chain: I
Molecule details ›
Chain: I
Length: 25 nucleotides
Theoretical weight: 8.17 KDa
RNA (26-MER) Chain: J
Molecule details ›
Chain: J
Length: 58 nucleotides
Theoretical weight: 18.46 KDa
RNA (5'-R(P*UP*UP*UP*UP*UP*U)-3') Chain: L
Molecule details ›
Chain: L
Length: 6 nucleotides
Theoretical weight: 1.88 KDa

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
Resolution: 2.9Å
Relevant EMDB volumes: EMD-30492
Expression system: Escherichia coli BL21(DE3)